If an earthquake moves an entire city 10 feet in a given direction, how are property and boundary lines affected?

This article says that Concepcion, Chile was moved 10 ft west as a result of their most recent earthquake. Assuming surveying method and property law are similar to what you are familiar with and the city attempted to restore property lines and boundaries (such as protected open space borders, military zones, or wilderness areas), what would change, the survey lines or the earth underneath them?